Machine-brake.



W. E. EDWARDS.

MACHINE BRAKE.

APPLICATION FILED 0m. 15, 1915.

LQWAM. Patented, Feb. 20, 1917.

iuivrrnn srarns raurnnr entries.

WILLIAM E. nnwnnns, or LESTERSHIRE, NEW YORK.

MACHINE-BRAKE.

Application filed flctober 15, 1915.

To all whom it may concern:

Be it known that I, WILLIAM E. Enwiinns, a citizen of the United States, residing at Lestershirain the county of Broome and State of New York, have invented certain new and useful Improvements in Machine- Brakes, of which the following is a specification.

My invention relates to an improvement in safety brakes for sole leather cutting machines in which an upper and lower brake is applied to the drive wheel of the cutting machine and operated by a tread and it has for its object to provide a safe, simple and automatically applied brake mechanism to the driving gear of sole leather cutting machines to guard against a repeat movement of the hammer. It is to be noted that in the operation of leather cutting machines there is great danger from a repeat move ment of the hammer caused by the second revolution of the drivinggear after the out has been made and thereby endangeringthe hands of the operators in manipulating the cutting die in the machine.

With this object in view my invention consists in certain novel features of construction and arrangement of parts as will be hereinafter fully described and pointed out in the claims, reference being had to the accompanying drawings in which Figure 1 is a side elevation of my device. Fig. 2'is a front elevation of a fragmentary part of my device. Fig. 3 is a plan view of a fragmentary part of my device. Fig. 4 is an end view in cross section of a part of my device. Fig. 5 is a front view of a fragmentary part of my device. The same reference characters denote like parts in'each of the several figures of the drawings.

In carrying out my invention I have the cutter frame A and upon it the cutter A. Mounted in the same I have the drive wheel B; also I have the lower brake shoe C and pivotally mounted on the rear end of brake shoe C by the pivot 3 I have the upper brake shoe D. At the outer end of D I have the foot projection E having in it the slot 4:. Mounted in slot 4 I have the turn screw 4 which enters plate 1 beneath shoe E. The lower brake shoe 0 extends outwardly in the lever formatirm. 5. Mounted on shoe E I have the parallel coil springs G. 6 connecting with the lever projection 5 of shoe Q. Mounted on the inner side of the brakes C and D I have the lining 7 of leather or I Specification of Letters Patent.

Patented Feb. 20, 1917. Serial No. 56,033.

other yielding material fastened to the brake D by means of the rivets 8. 8.

Horizontally mounted in the front of frame A by means of supports 8. 8 I have the shaft 9 and horizontally extending from said shaft 9 projecting inward I have the lever arm 10 and on the outer end of shaft 9 I have the lever arm 11 projecting outward in the end of which is mounted the roller 12. Pivotally mounted on the lever 10 I have the socket 10 and on bar 1 1 I have pivotally mounted socket l0 and the rod 13 threaded on each end extending downward has threaded connection with these sockets and thusris pivotally connected with the foot bar 14 and thus makes the foot tread adjustable and the movement of lever 11 adjustable as to distance. Mounted on the bars 14-. 14 I have the foot tread 15. Attached to frame A I have the coil spring 13 extending down to and connecting with tread l5 and which supports tread 15. The bar 14 at its inner end is pivotally mounted in any convenient manner on the support 16. Projecting from the brake 6 I have the lug 17 which is mounted upon the vertical support 18, which in turn is mounted in the tread bar 14. In normal position the brake shoe linings 7, 7 contact with the fly wheel 13. l

Inthe operation of my device when I desire to operate the cutting machine or to have the drive wheel of the cutter revolve I press down upon the footboard 15, as suspended by the coil spring 13, which moves downward the tread bar 14 and with it the shoe 6. The rod 13 cormecting with the lever 10 mounted on. the shaft 9 moves the lever 10 downward and at the same time moves the lever 11 upward supporting the roller 12 which presses against the tapered edge of plate and rolls under plate 1 held in position by key 4 on the underside of the shoe E and having a rolling contact therewith and thus lifting plate 1 and shoe E upward as lever 11 moves upward the brake shoe D; and thus by one movement by pressure upon the footboard 15 I release both brake shoes C and D, the contact of roller 12 with plate y giving a sudden and more extended lift to shoe 11 The brakes C and D are thus completely released from the drive wheel B and the drive wheel revolves causing the hammer of the cutting machine to pass downward and upward to its original position by one revolution of the drive wheel B. The upper brake shoe D covering the outer surfaceofj Wheel B prevents oil or other substance from.

collecting on the same. It is tobe noted that the drive Wheel B revolves toward the front of frame A and therefore as the upper shoe .comesdown and presses upon the drive wheel B, shoe D being coupled to the under shoe C by means of the coil springs 6. 6 which draws the under shoe G the more tightly around wheel B. It is to benoted that I have mounted on the inner side of both brake shoes C and D the leather lining 7 this leather linmg comlng 1n contact with the surface of the drive wheel B pressed by the weight and pressure of the brakes C and Dagainst the surface of the drive wheel B has a cllngmg grip effect upon the drive Wheel holding it, when under the pressure cutter.

of the brakes, in afirm, rigid position ready tobe released for another movement of the Thus with each downward movement ofthe footboard 15 pressed by the foot, a single revolution of the drive wheel is made and one cutting movement made of the cutter; the foot of the. operator being removed from the footboard 15 coil spring 18 brings the footboardto its original position;

the brakes C and D- drawn by the coil springs 6. 6 resume again instantly their of an upper and a lower substantially semi- Gopies of this patent may be obtained for circular brake shoe adapted to embrace a revolving part, said shoes being pivotally connected together at one end of each and resiliently connected at their other ends to I normally maintain said shoes in applied position, a spring sustained treadle, a rocking lever for actuating one of said shoes, connecting means between said lever and the treadle for rocking said lever when the treadle is depressed, and other means between the treadle and the second brake shoe for actuating the latter, simultaneously with the first shoe to release the mechanism.-

2. In a brake mechanism, the combination with a revoluble part, of an upper brake shoe, and a lower brake shoe embracing said revoluble part, said shoes being pivotally connected together at one end of each and resiliently connected at their other ends, to normally maintain said shoes in applied position about said revoluble part, one of said shoes having a radially projecting finger on its resiliently connecting end, a treadle, a spring sustaining said treadle, a rocking lever adapted to engage said finger, a connection between said treadle and said lever for raising one of said shoes through said fingerwhen the treadle is depressed, and an independent connection between the treadle and the'other shoe for releasing the same simultaneously with the first shoe.

In testimony whereof I have aflixed my signature in the presence of two witnesses.

IVILLIAM E. EDIVARDS.

Vitnesses:

E. A. JOYNER, M. I. PERRY.

five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

